Frank c



(No Model.)

F. G. STURGES.

MOLD.

am Q3 m: mums PEYERS 20.. PMOfO-LITRCL, WISNINGTON, m c,

lleirrnn S rerns PATENT @rricn.

PRANK O. STURGE8, OF \VlLKES-BARRE, PENNSYLVANIA, ASSIGNOR TO THE\VILKES-BARRE MOLDING MACHINE COMPANY, OF PENNSYLVANIA.

SPECIFICATION forming part of LettersPatent No. 443,686, dated December30, 1890.

Application filed February '7, 1890. Serial No. 339,564. (No model.)

To all whom it may concern: This practice in a measure overcame said ob-Be it known that I, FRANK C. STURGES, a jections, but was itselfobjectionable in that citizen of the United States, residing at thepattern being of only slightly less diam- NVilkes-Barr, in the county ofLuzerne, in the eter than the inner wall of the flask, was liable, 5State of Pennsylvania, have invented certain when in the act ofdescending into the flask, new and useful Improvements in Molds, of iffor any reason the flask was not accurately I which the following is aspecification. centered, to come into contact with the wall Myimprovements relate generally to the of the flask and thus occasion abreakage of 7 construction of sand molds by machinery, and the patternorsome portion of the machinery. 6o to relate particularly to that classof sand molds When the pattern was withdrawn from the which are employedin the casting of car flask loose particles of sand, caught betweenwheels, and in connection wit-h, and between it and the flask,would iall upon the mold and the combined sections of which, cast iron or thusnecessitate a certain amount of hand laother chills are usuallyemployed. bor in order to perfect the mold and put it in 15 In LettersPatent of the United States No. proper condition for closing andreceivingthe 360,086, dated March 29, 1887,'No. 360,119, metal; and,finally, the chill, taking its endated March 29, 1887,N0. 371,820, datedtire hearing on the sand, was liable when the October 18, 1887,-No.408,579, dated August mold was subjected to extreme pressure to (3,1889, and. No. 409,667, dated August 27, yield and thus cause animperfect casting. 2o 1889,-are shown described and claimed sun Iovercome all of these objections by adj ustdry methods of and apparatusfor forming ingthe height of the flask wall, and the point inolds formolding car wheels, in the practice to which the pattern shall descendso that the of which methods and the operation of which pattern willunder no circumstances descend apparatus,a pattern is pressed into thesand, down to the flask but to a point a short dis- 25 making animprint, which pattern, by the tance above it. I provide a flatsurfaceon same operation, rams or compresses the sand the rim of theflask and cause to be distribto therequired density. uted upon it, bysuitable means, a sufficient It has been found difficult in operatingthe quantity of sand, and I extend the pattern so mechanism and inpracticing the inventions that it will overlap the outer wall of theflask, o embraced in the foregoing patents, to bring with the resultthat in the descent of the pat the pattern to the precise level of theflask tern the sand on the rim of the flask is comwall, so that thechill, used in the castingof pressed to a great degree of hardness. Onthe a car wheel, could take its bearing on the rim compressed sand onthe rim of the flask the of the flask, and thus hold the mold firmly inchill finds a firm and rigid seatwhich will not 8 5 place when it wasclosed and clamped to reyield when the moldis closed and clamped; noceive the metal; thus, if the pattern did not hand labor is required toperfect the mold, descend to its proper place, the strain on the andthere is no danger of breakage by reason mold when closed and clampedeffected acomof the pattern striking the flask. pression of the sandunder and over the chill In the drawings, Figure 1 is a central sec- 0and thus caused an irregular and defective tional elevation of acomplete mold provided casting. Again, if the pattern descended bewith achill, and containing a casting of a low the proper point, the chill,taking its beardouble plate car wheel, which mold is of the ing on theedge of the flask, the parts of the character shown and described inUnited 1nold,the cope, drag, and chill, were prevented States LettersPatent No. 360,086, granted 5 5 from fitting closely together, wherebythe March 29, 1887, to Joseph J. Carr, for method molten metal wasallowedto escape. To overof molding car wheels. Fig. 2 is a central comethese objections the practice has been sectional elevation of a flask inwhich the to allow the pattern, which is a trifle smaller sand has beendistributed in approximately than the flask to descend into the flask ashort the form into which it is to be subsequently 1o; 50 distance, andto place the chill on the comcompacted by the pattern. Fig. 3 isasimilar pressed sand inside the wall of the flask. view of the sameshowing a sweep in operation upon said sand. Fig. i is a similar view ofthe same showing a pattern in place upon the sand, and Fig. 5 is acentral sectional eletion of the cope and drag flasks of a mold, whichmold embodies my invention and illustrates the relationship which thechill bears to it when its parts are placed together and shows in placein the mold a casting of a double plate ear wheel.

Similar letters of reference indicate corresponding parts.

Referring first to Fig. 1 it will be seen that the sand contained ineach flask is, as to its marginal portion between the matrix proper andthe wall of the flask, flush orlevel with the rim of the flask wall, andthat the chill bears against the rim of each of said flasks. The moldsin this figure are of the character heretofore in use, and hereinbeforereferred to.

In forming the mold which is the subject of my present application, Icharge a walled flask with the sand or other molding material, extend aportion of the sand or molding material to and over the surface of thetop of the wall of the flask, and fashion the sand contained in the bodyof the flask with more or less accuracy into the form into which thesand is to be ultimately compressed; I then occasion the descent of apattern of suflicient area to extend to the outer circumference of theflask, whereby the sand contained in the flask is compressed and formedinto the desired ultimate shape, and the sand on top of the flask wallis compressed into the required density to form the chill seat.

The following are the details of the operation thus briefly outlined:

The flask, A, in Fig. 2 is supplied with a quantity of sand, B, and saidsand is distributed in any preferred manner within said flask to a formwhich is, as stated, approximately that of the final desired form. Aportion of said sand covers the edge of the wall, a, as shown at b.

In Fig. 3 is shown a sweep, C, consisting of a rigid arm, 0, and aroller, 0, of corresponding outline to the arm, both designed to bemounted upon a vertically rotatable shaft,-- both of the usual andgeneral construction and mode of operation,-and both of sulti cientlength to extend over and therefore to operate upon the sand Z1 upon therim (1, as well as upon the sand in the interior of the flask.

In Fig. l is shown the flask A and its 0011- tained sand B, and also apattern D, of diameter sufficient to extend to the outer circumferenceof the flask, and therefore to operate upon the sand 12 upon the wall aas well as upon the sand contained in the flask,which pattern is shownas down in place upon the sand. The position which said pattern D isshown in the drawing as occupying, is the lowest which it is designed toreach, and the sand beneath it therefore is in the form which I hereinterm its ultimate form and in condition to be used in molding a wheel.

In Fig. 5 is shown a mold embodying my invention, it beingshown asholding between the cope and drag a chill E, while in the matrix isrepresented a cast car wheel F.

I do not herein claim or seek to cover the method of forming the molddescribed, as such method forms the subject of another application forpatent executed by me contemporaneously with this application, and filedin the Patent Office upon the 7th day of February, 1800, as Serial No.339,565.

llaving thus described my invention, I claim:

1. In a mold, a walled flask and a quantity ofmoldingmaterialdistributed and arranged to form a matrix therein and abearing upon and extending over the entire upper surface or edge portionof the side inclosin g wall thereof, substantially as set forth.

2. In combination, a walled flask and a quantity of molding materialdistributed and ar ranged to form a matrix therein and a hearing uponthe wall thereof, and a chill adapted to rest upon said bearing surfaceand supported by said bearing surface out of contact with the metal ofthe wall, substantially as set forth.

In testimony that I claim the foregoing as my invention 1 have hereuntosigned my name this 29th day of January, A. I). 1890.-

FRANK (I. STI'RGES. In presence of--- EDWARD E. lloY'r, ALEXANDERPn'r'rnustm.

